−2(1−m2)−4m2−(2−m2) equals
−2(1−m2)−4{m2−(2−m2)}=______.
An extensible string is woung over a rough pulley of mass m1 and radius R; and a cylinder of mass m2 and radius R such that as the cylinder rolls down the string un-wounds over the pulley as well the cylinder. Find the linear acceleration of the cylinder.
Two spheres of masses m1 and m2 (m1>m2) respectively are tied to the ends of a light, inextensible string which passes over a light frictionless pulley. When the masses are released from their initial state of rest, the acceleration of their centre of mass is: